protected void CourseDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
Courses _Course = new Courses();
_Course.Id = Convert.ToInt32(CourseDropDownList.SelectedValue);
var successe = _CourseAssigneManager.GetAllCourseDataByCourseCode(_Course.Id);
if (successe != null)
{
txtCourseName.Text = successe.CourseName.ToString();
txtCourseCredit.Text = Convert.ToDecimal(successe.CourseCredit).ToString("0");
}
}